More operators are being drawn to explore shales and other formations known to or suspected of holding petroleum liquids in the northern San Joaquin basin in California.
Among the geological objects of the activity are the Monterey and Kreyenhagen shales, the Temblor sandstone below Monterey, and the Avenal sandstone below the Kreyenhagen.
Leasing and drilling are fanning out in Fresno and Kings counties on either side of Kettleman North Dome and Kettleman Middle Dome oil fields.
New Gulf Resources LLC, Tulsa, is drilling on the flanks of the Kettleman domes targeting the Monterey and Kreyenhagen shales. And KMD Operating Co., The Woodlands, Tex., has produced light oil from Kreyenhagen at two wells at Kettleman Middle Dome.
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